//: containers/Maps.java
// Things you can do with Maps.
package containers;

import java.util.concurrent.*;
import java.util.*;
import net.mindview.util.*;
import static net.mindview.util.Print.*;

public class Maps
{
    public static void printKeys(Map<Integer, String> map)
    {
        printnb("Size = " + map.size() + ", ");
        printnb("Keys: ");
        print(map.keySet()); // Produce a Set of the keys
    }
    
    public static void test(Map<Integer, String> map)
    {
        print(map.getClass().getSimpleName());
        map.putAll(new CountingMapData(25));
        // Map has 'Set' behavior for keys:
        map.putAll(new CountingMapData(25));
        printKeys(map);
        // Producing a Collection of the values:
        printnb("Values: ");
        print(map.values());
        print(map);
        print("map.containsKey(11): " + map.containsKey(11));
        print("map.get(11): " + map.get(11));
        print("map.containsValue(\"F0\"): " + map.containsValue("F0"));
        Integer key = map.keySet().iterator().next();
        print("First key in map: " + key);
        map.remove(key);
        printKeys(map);
        map.clear();
        print("map.isEmpty(): " + map.isEmpty());
        map.putAll(new CountingMapData(25));
        // Operations on the Set change the Map:
        map.keySet().removeAll(map.keySet());
        print("map.isEmpty(): " + map.isEmpty());
    }
    
    public static void main(String[] args)
    {
//        test(new HashMap<Integer, String>());
//        test(new TreeMap<Integer, String>());
//        test(new LinkedHashMap<Integer, String>());
//        test(new IdentityHashMap<Integer, String>());
        test(new ConcurrentHashMap<Integer, String>());
//        test(new WeakHashMap<Integer, String>());
    }
} /*
   * Output: HashMap Size = 25, Keys: [15, 8, 23, 16, 7, 22, 9, 21, 6, 1, 14, 24, 4, 19, 11, 18, 3, 12, 17, 2, 13, 20,
   * 10, 5, 0] Values: [P0, I0, X0, Q0, H0, W0, J0, V0, G0, B0, O0, Y0, E0, T0, L0, S0, D0, M0, R0, C0, N0, U0, K0, F0,
   * A0] {15=P0, 8=I0, 23=X0, 16=Q0, 7=H0, 22=W0, 9=J0, 21=V0, 6=G0, 1=B0, 14=O0, 24=Y0, 4=E0, 19=T0, 11=L0, 18=S0,
   * 3=D0, 12=M0, 17=R0, 2=C0, 13=N0, 20=U0, 10=K0, 5=F0, 0=A0} map.containsKey(11): true map.get(11): L0
   * map.containsValue("F0"): true First key in map: 15 Size = 24, Keys: [8, 23, 16, 7, 22, 9, 21, 6, 1, 14, 24, 4, 19,
   * 11, 18, 3, 12, 17, 2, 13, 20, 10, 5, 0] map.isEmpty(): true map.isEmpty(): true ...
   */// :~
